Fuses & Circuit Breakers

Although they work in different ways, fuses and circuit breakers broadly have the same purpose; to protect electrical appliances and electrical circuits from short circuits, and excessive current (called overcurrent or overload).

Fuses

Fuses are relatively low cost electrical safety devices. If too much current enters the circuit, the fuse will burn out (sometimes called blowing out). When the fuse blows out it breaks the circuit. This protects the attached devices and allows you to touch devices without being electrocuted. When the fuse blows, it must be replaced before using the device or appliance again.

Circuit breakers

Circuit breakers work in a similar way to fuses, but they are resettable. Once a fault is detected (this is typically a short circuit or an excessive amount of current flowing through the circuit) the circuit breaker will interrupt the flow of current. When the circuit breaker trips, it's simply a case of flicking a switch to reset the circuit breaker. As soon as you've reset the circuit breaker, it is ready to use again.

Circuit Breakers
Circuit Breakers
Earth & Lightning Protection
Earth & Lightning Protection
Fuse Holders & Accessories
Fuse Holders & Accessories
Fuses
Fuses

47265 Products showing for Fuses & Circuit Breakers

2250 of 999+
Eaton xEffect MCB, 2P, 15A Curve B, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 847-3134
  • Mfr. Part No. 278733 FAZ-B15/2
Each
HK$507.20
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 211-3792
  • Mfr. Part No. 3VA2163-5HN36-0AA0
Each
HK$5,897.30
Siemens 10V ac Auxiliary Switch
  • RS Stock No. 223-7680
  • Mfr. Part No. 5TT4930
Each
HK$303.00
Better World
Siemens SENTRON 5SY7 MCB, 1P, 13A Curve C, 400V AC, 72V DC, 15 kA Breaking Capacity
  • RS Stock No. 209-6035
  • Mfr. Part No. 5SY7113-7
Each
HK$258.40
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3871
  • Mfr. Part No. 3VA2063-7JP36-0AA0
Each
HK$26,336.40
ABB SMISSLINE TP MCB, 1P, 13A Curve C, 240V AC
  • RS Stock No. 246-2477
  • Mfr. Part No. 2CCS571001R0134 S401M-C13
Each
HK$275.20
ABB System Pro M Compact S200M MCB, 3+N, 1.6A, Type Z, 400V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 200-650
  • Mfr. Part No. 2CDS273103R0258
Each
HK$4,283.47
Schneider Electric 4 Phase Surge Arrester, 75kA, 1500V (Volts), Clip-On Mount
  • RS Stock No. 438-842
  • Mfr. Part No. M9L17240
Each
HK$14,684.32
Siemens SENTRON 5SY Circuit Breaker, 4P, 40A Curve D, 440V AC, 60V DC, 25 kA Breaking Capacity
  • RS Stock No. 664-326
  • Mfr. Part No. 5SY8440-8
Each
HK$4,300.67
Siemens 160A Solid Link for LV HRC Fuses
  • RS Stock No. 395-715
  • Mfr. Part No. 3NG1002
Each (In a Pack of 3)
HK$49.533
Better World
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 3 channels
  • RS Stock No. 259-3076
  • Mfr. Part No. 1SDA070930R1
Each
HK$93,126.77
Schneider Electric Acti9 iID RCCB, 80A, 2 Pole, 300mA, Type AC, 220 → 240V ac
  • RS Stock No. 130-795
  • Mfr. Part No. A9R14280
Each
HK$2,444.10
Osram Surge Protector, 15A, 20kV, Screw Mount Mount
  • RS Stock No. 251-5285
  • Mfr. Part No. SPD-20-275-G2
Each
HK$207.27
FUSE 250V FA 3AB Pb-FREE 10A
  • RS Stock No. 565-381
  • Mfr. Part No. 0314010.MXP
Each
HK$827.63
Eaton, xEnergy MCCB 1P 250A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 537-5618
  • Mfr. Part No. 259127 NZMH2-VE250
Each
HK$12,631.62
RS PRO PC Board Non Resettable Fuse, Radial 2A, 250V
  • RS Stock No. 767-5156
Each (In a Pack of 10)
HK$2.094
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 40A, Breaking Capacity 2.5 kA
  • RS Stock No. 245-229
  • Mfr. Part No. 3VA6140-8HN41-2AA0
Each
HK$13,560.40
Better World
Schneider Electric Acti 9 Acti9 iDT40T MCB, 1+N, 32A Curve C, 6 kA Breaking Capacity
  • RS Stock No. 191-6093
  • Mfr. Part No. A9P22632
Each
HK$307.00
Legrand 8A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 180-6117
  • Mfr. Part No. 0 133 08
Each (In a Box of 10)
HK$20.33
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 80A, Breaking Capacity 15 kA, Fixed Mount
  • RS Stock No. 231-505
  • Mfr. Part No. 110290 NZMH2-A80-BT
Each
HK$5,533.92
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